Stationary chimney and smoke-stack cowl



(No Model.) 2 Sheets'Sheet 1Q W. 1). CRAIG. STATIONARY CHIMNEY AND SMOKE STACK GOWL. No. 550,160. Patented Nov. 19, 1895.

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W. D. CRAIG.

STATIONARY CHIMNEY AND SMOKE STACK COWL'. N0..550,160. Patented Nov. 19, 1895.

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ANDREW HERAHAM. PHOTU-UTHOVWASHINGTDN, 0,5.

UNITED STATES PATENT OF ICE.

WILLIAM D. CRAIG, OF KANSAS CITY, MISSOURI.

STATIONARY CHIMNEY ANRD SMOKE-STACK COWL.

SPECIFICATION forming part of Letters Patent No. 550,160, dated November 19, 1895.

I of Missouri, have invented certain new and useful Improvements in Stationary Chimney and Smoke-Stack Oowls, of which the following is a specification, reference being had therein to the accompanying drawings.

My invention relates to an improvement in stationary chimney and smoke-stack cowls, the object of the invention being to provide a device of the class described by means of which when applied to a chimney a free passage for the smoke and other products of combustion is always maintained regardless of the direction or intensity of the wind.

A further object of the invention is to provide a device of the class described which when required 'may be cheaply and easily made and which can be readily placed in position or removed from the chimney or smoke stack as occasion may demand.

In the accompanying drawings, Figure 1 is a perspective view of a chimney with an improved cowl applied thereto. Fig. 2 is a similar view of the cowl detached. Fig. 3 is a view on the line as a; of Fig. 2, looking toward the cap of the cowl. Fig. 4 is a view of the cowl as applied to a smoke-stack. Fig. 5 is a sectional view on the line as m of Fig. 4.

Like numerals of reference indicate the same parts in all the figures.

Referring particularly to the drawings, the numeral 4 designates the chimney, which maybe of any form and construction.

In Fig. 1 of the drawings, for purpose of illustration, I have shown the chimney as rectangular in cross -section and provided along its upper edge with a bead 5. The form, size, and shape of the chimney or smokestaok are, however, immaterial, as the pectiliar construction of my cowl renders it applicable to' all forms of chimneys or smokestacks.

As shown in the drawings, the cowl is preferably made of three pieces of galvanized sheet-iron, one of which forms the cap 6. The wings 7 7 are formed of a single piece of sheet metal creased and bent centrally from end to end. The wings 8 8 are similarly formed of another piece, and these two pieces Serial No. 541,460. (No model.)

forming the wings are brought together and secured along the central crease'by the rivets 9. Along their upper edges the wings are secured to the cap 6. It will be observed that the wings extend radially from the said central crease and each has its vertical edges partly cut away to form shoulders 10. The verticaledges 11 of the cut-away portions are rolled over so as to present a rounded edge, for a purpose to be presently described. The lower corners are inclined, as shown at 12, to facilitate the operation of placing the cowl in position on the chimney or smoke-stack.

In practice the cowl is made of such a size that when placed upon the chimney or smokestaok. and pushed downward the rounded edges 11 will enable it to slide with comparative ease into the chimney or smoke-stack, while the shoulders 10 rest upon the top surface thereof. In this manner the cowl may be securely fixed in position without other means of fastening; but whenever desired it may be readily removed by simply lifting it out.

It will be observed that the wings divide the chimney or smoke-stack into four parts without materially lessening its capacity, and each part or division is wholly distinct and separated from the others, and it is obvious from a consideration of this construction that whatever the direction or intensity of the wind there will at all times be at least two of the divisions open and sheltered, thus affording a free escape for the smoke and other products of combustion. The lower ends of the wings extend down into the chimney or smoke-stack a sufficient distance to obviate the possibility of the wind circulating under them and through the divisions formed .by the wings.

Figs. 4: and 5 show the form of the cowl as particularly adapted to smoke-stacks, the only difference consisting in the edges 13 of the cut-away portions of the wings, which instead of being rolled entirely over, as in the form shown in Fig. 2, are bent so as to be flat along the curved interior of the smokestack.

The cowl can be cheaply and readily made to fit any size or style of chimney. There are no bearings or other working parts to get out of order, and in practice my cowl has been found. to perform perfectly all the rebeing adapted to restupon the upper surface quireincnts of an ideal device of its class. of the chimney or smoke stack, substantially Having thus described my invention, I as described.

claim as new and desire to secure by Letters In testimony whereof I have affixed my sig- 5 Patent of the United States-' nature in presence of two witnesses.

A stationary chimney or smoke stack cowl, comprising vertical, radiallyextending wings "WILLIAM D. CRAIG. having shoulders formed by cutaway por- \Vitncsses: tions which are arranged to fit the interior of KITTIE REES,

10 the chimney or smoke stack said shoulders MYRTLE -\VOODLING. 

